The contribution of buildings to climate change is widely acknowledged. This book investigates how building regulatory systems are addressing the current and future effects of climate change, and how these systems can be improved. After presenting a comprehensive overview of how the current building regulatory system developed, some of the inadequacies are identified. The largest part of the book examines the potential for innovative policy solutions to address the real world problem of mitigating and adapting buildings to climate change. This publication contributes significantly to our understanding of the complexities of long-term energy efficiency in buildings. This book was originally published as a special issue of the Building Research & Information journal.